JP2014148025A - Reciprocally cutting electric tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide such a cutting tool using a charging type battery as a power source, as is enabled to use a cutting tool of a high output inexpensively by exemplifying an electric power source by a low-output battery more widely spread at present without using a high output battery.SOLUTION: Two widely spread 18 V batteries 34A and 34B are mounted in series to make a jigsaw (or a reciprocally cutting electric tool) 10 for driving an electric motor using the total voltage as a rating voltage.

Description

  The present invention relates to a reciprocating cutting power tool. Specifically, the present invention relates to a hand-held reciprocating cutting electric tool called a jigsaw provided with a plurality of detachable rechargeable batteries.

A technique related to a power tool that uses a rechargeable battery as a power source is disclosed in Patent Document 1 below. The battery of this kind of electric tool is provided with an output voltage of 18V or 36V, for example. 18V output battery (18V battery) is mainly used for hand-held tools with relatively small and low output models, and larger 36V output batteries for relatively large cutting tools that require higher output. (36V battery) is used.
In recent years, large-sized electric tools such as garden tools have been made cordless, and along with this, large 36V batteries have become widespread, but smaller 14.4V batteries and 18V batteries are still mainstream and popularized. ing. In addition, a user of a normal power tool can prepare a plurality of spare batteries and charge them in parallel with the work so that the user can work continuously for a long time with one power tool while replacing the battery. I have to. Also in this respect, a small 18V battery is more widely used than a large 36V battery.
Furthermore, the battery for electric tools can be reused between different electric tools of the same power supply specification. Since there are many types of 18V-specific power tools widely available, 18V batteries are much more popular than 36V batteries.

JP 2010-201598 A JP 2011-218501 A

  However, since a high-power cutting tool that uses a 36V battery as a dedicated power source cannot be diverted, the user can prepare a 36V battery dedicated to a high-power cutting tool. Inevitably, there is a problem that the cost is high in this respect, and there is room for further improving the handleability of the high-power cutting tool.

  Thus, the present invention was devised in view of the above points, and the problem to be solved by the present invention is that a low output battery can be used as a power source for a relatively high output cutting tool. By making it, it exists in improving the convenience and the handleability of the said cutting tool further.

In order to solve the above-described problems, the reciprocating cutting power tool according to the present invention takes the following means.
First, a reciprocating cutting power tool according to the present invention is provided with a base to be brought into contact with a cutting material and an upper surface side opposite to the position of the cutting material with respect to the base as a precondition of a basic configuration. A tool body that includes an electric motor as a driving source, and a reciprocating motion conversion mechanism that converts the rotational output of the electric motor of the driving section to a blade and transmits the reciprocating motion. And a handle portion gripped by the user, and the blade is reciprocated to perform a cutting process. And as a characteristic configuration in such a basic configuration, the tool body is provided with two battery mounting portions for attaching a rechargeable battery as a power source in an exposed state that is removable and visible from the outside. It is.

  According to the basic configuration of the present invention described above, two low-output batteries can be attached and a high-output cutting tool can be used, whereby a low-output battery can be used effectively and high-output cutting can be performed. The convenience and handleability of the tool can be further enhanced.

The basic configuration of the present invention described above preferably takes the following means.
First, the two battery mounting portions in the present invention are symmetrically positioned with respect to the longitudinal axis or the horizontal axis of the tool passing through the center of gravity when the tool is viewed from the upper surface when the battery is mounted. It is preferable that one is provided at a time.
By adopting such a configuration, the arrangement position of the two batteries becomes a symmetrical direction position with respect to the axis passing through the center of gravity of the tool, so that the balance is good.

Further, the center of gravity of the two batteries themselves in the present invention is within a region extending in the front-rear direction from the region surrounded by the maximum outer width in the left-right direction and the up-down direction when the tool is viewed in a cross-section in the left-right direction. It is preferable that the two battery mounting portions are arranged and configured.
By adopting such a configuration, the center of gravity of the two batteries themselves is within the region of the maximum outer width of the tool, so that the balance is also good in this case.

Further, the mounting portions of the two batteries are arranged and configured so that the center of gravity positions of the two batteries themselves in the present invention are positioned on the longitudinal axis of the tool passing through the center of gravity position of the tool in the battery-mounted state. It is preferable to have a configuration.
With this configuration, the center of gravity of the two batteries is on an axis passing through the center of gravity of the tool, so that the balance is the best and the convenience and handling of the tool are improved.

In the present invention, the two battery mounting portions are disposed so as to face each other at the rear position of the tool main body, and the battery is inserted into the battery mounting portion from above and attached. Is preferred.
With this configuration, the battery can be easily attached to and detached from the battery mounting portion, and the entire tool can be made compact.

  According to the present invention, by making it possible to use a low-output battery as a power source for a relatively high-power cutting tool, the convenience and handling of the cutting tool can be further enhanced.

It is a side view which shows the whole external appearance of the jigsaw which concerns on 1st Embodiment. It is a side view which fractures | ruptures the external appearance of the jigsaw which concerns on the same embodiment, and shows an internal structure. It is a top view which shows the whole external appearance of the jigsaw which concerns on the same embodiment. It is a rear view which shows the whole external appearance of the jigsaw which concerns on the embodiment. It is a side view which shows the whole external appearance of the jigsaw which concerns on 2nd Embodiment. It is a top view which shows the whole external appearance of the jigsaw which concerns on the same embodiment. It is a rear view which shows the whole external appearance of the jigsaw which concerns on the embodiment. It is a side view which shows the whole external appearance of the jigsaw which concerns on 3rd Embodiment. It is a top view which shows the whole external appearance of the jigsaw which concerns on the same embodiment. It is a rear view which shows the whole external appearance of the jigsaw which concerns on the embodiment. It is a side view which shows the whole external appearance of the jigsaw which concerns on 4th Embodiment. It is a top view which shows the whole external appearance of the jigsaw which concerns on the same embodiment. It is a rear view which shows the whole external appearance of the jigsaw which concerns on the embodiment. It is a side view which shows the whole external appearance of the jigsaw which concerns on 5th Embodiment. It is a top view which shows the whole external appearance of the jigsaw which concerns on the same embodiment. It is a rear view which shows the whole external appearance of the jigsaw which concerns on the embodiment. It is a perspective view which shows a battery. It is a top view which shows a battery attachment part.

  Below, each embodiment of a reciprocating cutting electric tool concerning the present invention is described based on a drawing. As an embodiment, a jigsaw 10 is illustrated as an example of a reciprocating cutting power tool.

[First Embodiment]
1 to 4 show a first embodiment. FIG. 1 is a side view showing the overall appearance of the jigsaw 10, and FIG. 2 is a side view showing the internal structure by breaking the external housing. 3 is a top view and FIG. 4 is a rear view.
As shown in FIG. 1, the jigsaw 10 is roughly divided into a base 12 whose lower surface is in contact with the cutting material W, and an upper surface side opposite to the position of the cutting material W with respect to the base 12. It consists of a tool body 14 that supports the base 12. The external appearance of the tool body 14 is generally formed by being covered with a resin housing. Then, as shown in FIG. 2, the tool main body 14 converts the drive unit 18 including the electric motor 16 as a drive source and the rotational output of the electric motor 16 of the drive unit 18 to the blade 20 in a reciprocating operation. And a reciprocating motion conversion mechanism portion 22 for transmitting and a handle portion 24 held by a user. The drive unit 18, the reciprocating motion conversion mechanism unit 22, and the handle unit 24 are arranged such that the drive unit 18 is disposed at a lower position, and the handle unit 24 is disposed in a loop shape at an upper position of the drive unit 18. The reciprocating motion conversion mechanism 22 is disposed at these front positions.
1 and 2, the user is located on the rear side of the jigsaw 10. The user grasps the handle portion 24 and places the base 12 on the upper surface of the cutting material W and moves the jig 20 to the front side (forward indicated by a white arrow in FIG. 1) to move the blade 20. Cutting can be performed by cutting into the cutting material W. In the description of each embodiment described below, including the first embodiment, in the front-rear direction of the members and structures, the direction in which cutting proceeds is the front side, and the user side is the rear side. Further, the left and right direction and the up and down direction are directions seen from the position of the user.
A switch lever 26 is provided on the lower surface side of the handle portion 24. When the user pulls the switch lever 26 upward with the fingertip of the hand holding the handle portion 24, the electric motor 16 is activated. When the electric motor 16 is started, the rotational output is converted into the reciprocating motion of the rod 28 in the vertical direction via the reciprocating motion converting mechanism 22, whereby the blade 20 reciprocates up and down.

The two battery mounting portions 30 </ b> A and 30 </ b> B in the first embodiment are positioned at the rear portion of the tool main body portion 14. The battery attachment portions 30A and 30B are formed as an arrangement state facing both surfaces of the attachment portion 32 formed as a state in which the handle portion 24 arranged at the upper position and the drive portion 18 arranged at the lower position are connected. Has been. 1 to 4 show the two batteries 34A and 34B mounted on the battery mounting portions 30A and 30B. As can be clearly understood from these drawings, the battery mounting portions 30A and 30B are arranged as a configuration in which the batteries 34A and 34B are detachable and can be mounted in an exposed state visible from the outside. In this description, when the two batteries 34A and 34B are collectively referred to, the reference numeral may be simply 34.
An example of the battery 34 used is shown in FIG. In the present embodiment, the battery 34 is configured to be slid from the upper side to the lower side and attached by the insertion method in the battery mounting portions 30A and 30B.

  The battery 34 will be described with reference to FIG. The battery 34 is an 18V output lithium-ion battery in which a plurality of battery cells are accommodated in a battery case. The battery 34 can be repeatedly used as a power source by being removed from the jigsaw 10 and charged by a separately prepared charger. . Both batteries 34 are provided with a pair of left and right rail portions 34b and 34c on the upper surface thereof. Positive and negative connection terminals 34d and 34e are provided between the left and right rail portions 34b and 34c, respectively. A control signal transmission / reception connector 34f is provided between the positive and negative connection terminals 34d and 34e.

The configuration of the battery mounting portions 30A and 30B described above is configured such that the battery 34 can be mounted by sliding movement. The configuration is shown in FIG. The battery mounting portions 30A and 30B are provided with a pair of rail portions 30a and positive and negative connection terminals 30b and 30c in the front-rear direction, respectively. Between the positive and negative connection terminals 30b and 30c, connector receiving portions for transmitting and receiving control signals to and from the battery 34 are provided. The rails 34b and 34c of the battery 34 are engaged with the pair of front and rear rails 30a, respectively, and the battery 34 can be slid and mechanically attached, and conversely removable. Further, the positive and negative connection terminals 30b and 30c are connected to the positive and negative connection terminals 34d and 34e of the battery 34, whereby the battery 34 is electrically connected, and the connector 34f of the battery 34 is connected to the connector receiving portion. Thus, various signals are transmitted and received between the battery 34 and a controller (not shown).
Further, a claw engagement portion 30d for engaging a lock claw 34g provided on the battery 34 and locking the attached state is provided on the left side of both the battery attachment portions 30A and 30B.
17 and 18, the batteries 34 are respectively attached to the batteries by moving the batteries 34 downward (attachment direction) in FIG. 18 with respect to the battery attachment portions 30A and 30B. It can be attached to the portions 30A and 30B. Conversely, the battery 34 can be detached from the battery attachment portions 30A and 30B by moving the battery 34 upward (in the removal direction) in FIG. 18 with respect to the battery attachment portions 30A and 30B.
As shown in FIGS. 3 and 4, on the front surface in the direction of removal of the batteries 34A and 34B, an unlock button 34a for releasing the engagement state of the lock claw 34g with the claw engagement portion 30d of the battery attachment portions 30A and 30B. Is provided.

  As shown in FIG. 17, regarding the external dimensions of the battery 34, assuming that the length L, the width D, and the height H in the longitudinal direction, the battery 34 is generally a rectangular parallelepiped having a size relationship of length L> width D> height H. It has a shape. As shown in FIG. 1, in the present embodiment, the battery 34 is arranged so that the longitudinal direction is the vertical direction as described above, and is mounted by sliding and moving in the upward direction. It can be removed by sliding it. More specifically, the mounting state of the battery 34 to the battery mounting portions 30A and 30B is mounted such that the upper side is inclined slightly rearward from the lower side, so that the mounting and dismounting can be easily performed. . Further, since the batteries 34A and 34B are arranged facing each other, the right thumb is easily hooked to the unlock button 34a of the battery 34A arranged on the right side, and the left thumb is easily hooked to the unlock button 34a of the battery 34B arranged on the left side. Easy to do.

  In the jigsaw 10 of the first embodiment, the position of the center of gravity in the state where the battery 34 is mounted is indicated by a symbol G in each figure. As shown in FIG. 3, the positions of the battery attachment portions 30 </ b> A and 30 </ b> B are symmetrical positions with respect to the longitudinal axis CL <b> 1 passing through the gravity center position G when viewed from the upper surface side. For this reason, the batteries 34A and 34B attached to the battery attachment portions 30A and 30B are also arranged at symmetrical positions with respect to the axis CL1, and the attachment state of the jigsaw 10 to the tool main body portion 14 is well balanced. In particular, in the present embodiment, as shown in FIG. 1, the total center of gravity position Gb of the two batteries 34A and 34B itself is arranged on the axis line CL1, so that the balance becomes very good. Yes. As shown in FIG. 1, the axis CL <b> 1 is a center line in the front-rear direction drawn through the center of gravity G and parallel to the lower surface of the base 12.

Moreover, as shown in FIG. 1, the maximum width part dimension of the up-down direction when it sees in the left-right direction cross section of the tool main-body part 14 is shown by X, the upper end part line is shown by X1, and a lower end part line is shown by X2. ing. The upper end line X1 and the lower end line X2 are lines drawn parallel to the axis CL1 shown in FIG. Also, as shown in FIG. 3, the maximum width portion dimension in the left-right direction is indicated by Y, the left end line is indicated by Y1, and the right end line is indicated by Y2. The left end line Y1 and the right end line Y2 are lines drawn in parallel to the axis CL1 shown in FIG.
The two batteries 34A and 34B themselves are in both the range area X surrounded by the upper end line X1 and the lower end line X2 and the range area Y surrounded by the left end line Y1 and the right end line Y2. If the total center of gravity position is included, the balance of the jigsaw 10 as a whole is good. The total center of gravity position of the two batteries 34A and 34B themselves in the present embodiment is indicated by the symbol Gb, and this center of gravity position Gb is within the range region of X shown in FIG. 1 and Y shown in FIG. The positions of the battery attachment portions 30A and 30B are arranged and configured so as to be within the range area. The region range in which the region range indicated by X and the region range indicated by Y overlap is the “region surrounded by the maximum outer width in the horizontal direction and the vertical direction when the tool is viewed in the cross section in the horizontal direction” of the present invention. is there.
Preferably, the total center-of-gravity position Gb of the two batteries 34 </ b> A and 34 </ b> B itself may be within the range region of the maximum outer shape when the tool main body 14 of the jigsaw 10 is viewed in the cross section in the left-right direction.

According to the jigsaw of the first embodiment configured as described above, two 18V batteries 34 for low output are attached, which are connected in series, and the electric motor 11 having a rated voltage of 36V is used as a drive source. The high output jigsaw 10 can be obtained. As a result, the low output 18V battery 34 can be used effectively, and the convenience and handling of the high output jigsaw 10 can be further enhanced. In particular, it is possible to divert 18V batteries that are currently widely used, including spare batteries, etc., so that it is possible to use the high-power cutting tool 1 with 36V specifications without purchasing expensive 36V batteries separately. A remarkable effect can be obtained in that the cost of the cutting work can be reduced and the workability can be improved.
In addition, according to the arrangement configuration of the battery 34 of the first embodiment, compared to the existing jigsaw, there is less influence on the overall length (length in the front-rear direction) and the width (length in the left-right direction), and the jigsaw 10 Since the overall compactness can be maintained, the handling property is good. Moreover, the detachability is good.

[Second Embodiment]
A second embodiment is shown in FIGS. In the following embodiments, the same components as those in the first embodiment described above are denoted by the same reference numerals, and detailed description thereof may be omitted. The configuration of the battery 34 shown in FIG. 17 and the battery mounting portions 30A and 30B shown in FIG. 18 described in the first embodiment are substantially the same in the following embodiments, and the detailed description thereof is as follows. Omitted.
FIG. 5 which shows 2nd Embodiment is a side view which shows the whole external appearance of the jigsaw 10, FIG. 6 is a top view, FIG. 7 is a rear view.
As shown in these drawings, the battery mounting portions 302A and 302B of the jigsaw 10 of the second embodiment are provided on the side portions of the drive unit 18 in the left-right direction. As well shown in FIGS. 6 and 7, a battery 342A is mounted on the right battery mounting portion 302A, and a battery 342B is mounted on the left battery mounting portion 302B. The right battery mounting portion 302A is formed on the side surface of the mounting portion 322A formed integrally with the right housing of the driving unit 18, and the left battery mounting portion 302B is formed integrally with the left housing of the driving unit 18. It is formed on the side surface of the mounting portion 322B. According to the arrangement configuration of the batteries 342A and 342B, the gravity center position Gb can be the center of the handle portion 24, and can be stably held in the air at the start of cutting. Also in the present embodiment, as shown in FIG. 6, the total center of gravity Gb of the two batteries 342A and 342B itself is arranged on the axis CL1, so that the balance is very high. It is getting better.
The attachment direction for attaching the batteries 342A and 342B to the battery attachment portions 302A and 302B is performed by sliding from the front to the rear, and the removal is performed by sliding from the rear to the front. In the case of removal, the lock release button 34a is pressed to release the lock of the battery 342. Also in the present embodiment, as can be clearly seen from the drawing, the battery mounting portions 302A and 302B are arranged in an exposed state in which the batteries 342A and 342B can be attached and detached and are visible from the outside.

Also in the case of the second embodiment, as in the case of the first embodiment, in FIG. 5, the maximum width location dimension in the vertical direction when viewed in the cross section in the horizontal direction of the tool body 14 is indicated by X. The upper end line is indicated by X1, and the lower end line is indicated by X2. In addition, as shown in FIG. 6, the maximum width portion dimension in the left-right direction is indicated by Y, the left end line is indicated by Y1, and the right end line is indicated by Y2.
Also in this embodiment, the total center-of-gravity position Gb of the two batteries 342A and 342B itself is in the range region X shown in FIG. 5 and the battery is in the range region Y shown in FIG. The positions of the attachment portions 302A and 302B are arranged and configured. Thereby, also in 2nd Embodiment, the two batteries 342A and 342B are arrange | positioned with sufficient balance as an arrangement structure of the jigsaw 10 whole. Also in this embodiment, as shown in FIGS. 5 and 6, the total center of gravity position Gb of the two batteries 342A and 342B is arranged on the axis line CL1, so that the balance is extremely high. It is getting better.

  Also in the second embodiment, the same operational effects as those of the first embodiment described above can be obtained.

[Third Embodiment]
A third embodiment is shown in FIGS. 8 is a side view showing the overall appearance of the jigsaw 10, FIG. 9 is a top view, and FIG. 10 is a rear view.
As shown in these drawings, the battery attachment portions 303A and 303B of the jigsaw 10 of the third embodiment are provided at the front end position and the rear end position of the tool main body portion 14, respectively. As well shown in FIGS. 8 and 9, a battery 343A is attached to the battery attachment portion 303A on the front side, and a battery 343B is attached to the battery attachment portion 303B on the rear side. The battery attachment portion 303A on the front side is formed on the front surface of the attachment portion 323A formed integrally with the housing that covers the reciprocating motion conversion mechanism portion 22. The battery attachment portion 303B on the rear side is formed on the rear surface of the attachment portion 323B formed integrally with the housing that covers the portion that connects the drive portion 18 in the lower position and the handle portion 24 in the upper position. According to the arrangement configuration of the batteries 343A and 343B, the width (length in the left-right direction) of the jigsaw 10 is not affected.
The attachment direction for attaching the batteries 343A and 343B to the battery attachment portions 303A and 303B is performed by sliding from the upper side to the lower side, and the removal is performed by sliding the upper side from the lower side. In the case of removal, the lock release button 34a is pressed to release the lock of the battery 343. Also in the present embodiment, as can be clearly seen from the drawing, the battery attachment portions 303A and 303B are arranged in an exposed state in which the batteries 343A and 343B can be attached and detached and are visible from the outside.

  Also in the jigsaw 10 of 3rd Embodiment, the gravity center position in the state which mounted | wore with battery 343A, 343B is shown by each figure with the code | symbol G. FIG. As shown in FIG. 9, the positions of the battery attachment portions 303 </ b> A and 303 </ b> B are symmetrical positions with respect to the horizontal axis CL <b> 2 passing through the center of gravity G when viewed from the upper surface side. For this reason, the batteries 343A and 343B attached to the battery attachment portions 303A and 303B are also arranged at symmetrical positions with respect to the axis CL2, and the attachment state of the two batteries 343A and 343B to the tool main body portion 14 is balanced. It has become. The axis line CL2 is a horizontal line drawn parallel to the lower surface of the base 12 through the center of gravity G shown in FIG.

Also in the case of the third embodiment, as in the case of each of the above-described embodiments, in FIGS. 8 and 10, the maximum width location dimension in the vertical direction when viewed in the left-right direction cross section of the tool body 14 is X. The upper end line is indicated by X1, and the lower end line is indicated by X2. Further, as shown in FIG. 9, the maximum width portion dimension in the left-right direction is indicated by Y, the left end line is indicated by Y1, and the right end line is indicated by Y2.
Also in this embodiment, the total center-of-gravity position Gb of the two batteries 343A and 343B itself is within the range area X shown in FIG. 8, and the battery is located within the range area Y shown in FIG. The positions of the attachment portions 303A and 303B are arranged and configured. Thereby, also in 3rd Embodiment, the two batteries 343A and 343B are arrange | positioned with sufficient balance as an arrangement structure of the jigsaw 10 whole.

  In the third embodiment, the same operational effects as those of the above-described embodiments can be obtained.

[Fourth Embodiment]
The fourth embodiment is shown in FIGS. 11 to 13. 11 is a side view showing the overall appearance of the jigsaw 10, FIG. 12 is a top view, and FIG. 13 is a rear view.
As shown in these drawings, the battery attachment portions 304A and 304B of the jigsaw 10 of the fourth embodiment are provided from the rear end position of the handle portion 24 of the tool main body portion 14 toward the rear. As well shown in FIG. 12, a battery 344A is attached to the right battery attachment portion 304A, and a battery 344B is attached to the left battery attachment portion 304B. The battery attachment portion 304A on the right side is formed on the right side surface of the attachment portion 324A formed integrally with the housing that covers the rear end portion of the handle portion 34. The left battery mounting portion 304B is formed on the rear surface of the similarly formed mounting portion 324B. It should be noted that the right battery attachment portion 304A and the left battery attachment portion 304B are arranged and configured such that the widths facing rearward are narrowed. For this reason, the batteries 344A and 344B mounted on the battery mounting portions 304A and 304B are also mounted so as to be close to each other toward the rear. According to such an arrangement, the overall length (length in the front-rear direction) and width (length in the left-right direction) are less affected than the existing jigsaw, and the overall compactness of the jigsaw 10 can be maintained. Therefore, handling property is good.
The attachment direction for attaching the batteries 344A and 344B to the battery attachment portions 304A and 304B is performed by sliding from the rear to the front, and the removal is performed by sliding from the front to the rear. In the case of removal, the lock release button 34a is pushed to release the locks of the batteries 344A and 344B. Also in the present embodiment, as can be clearly seen from the drawing, the battery attachment portions 304A and 304B are arranged in an exposed state in which the batteries 344A and 344B can be attached and detached and are visible from the outside. For this reason, it is easy to hook a finger on the unlock button 34a, and it is easy to attach and detach.

  Also in the jigsaw 10 of 4th Embodiment, the gravity center position in the state which mounted | wore with battery 344A, 344B is shown by each figure with the code | symbol G. FIG. As shown in FIG. 12, the positions of the battery mounting portions 304A and 304B are symmetrical positions with respect to the longitudinal axis CL1 passing through the gravity center position G when viewed from the upper surface side. For this reason, the batteries 344A and 344B attached to the battery attachment parts 304A and 304B are also arranged at symmetrical positions with respect to the axis CL1, and the attachment state of the two batteries 344A and 344B to the tool body part 14 is balanced. It has become.

Also in the case of the fourth embodiment, as in the case of each of the above-described embodiments, in FIG. 11, the maximum width portion dimension in the vertical direction when viewed in the left-right direction cross section of the tool main body 14 is indicated by X. The upper end line is indicated by X1, and the lower end line is indicated by X2. Further, as shown in FIG. 12, the maximum width portion dimension in the left-right direction is indicated by Y, the left end line thereof is indicated by Y1, and the right end portion line is indicated by Y2.
Also in the present embodiment, the total center of gravity position Gb of the two batteries 344A and 344B itself is in the X range region shown in FIG. 11 and the battery is mounted so that it is in the Y range region shown in FIG. The positions of the sections 304A and 304B are arranged and configured. Thereby, also in 4th Embodiment, two battery 344A, 344B is arrange | positioned with sufficient balance as an arrangement structure of the jigsaw 10 whole. Also in this embodiment, as shown in FIGS. 11 and 12, the total center of gravity position Gb of the two batteries 344A and 344B is arranged on the axis line CL1, so that the balance is very high. It is getting better.

  Also in the fourth embodiment, the same operational effects as those of the above-described embodiments can be obtained.

[Fifth Embodiment]
The fifth embodiment is shown in FIGS. 14 to 16. FIG. 14 is a side view showing the overall appearance of the jigsaw 10, FIG. 15 is a top view, and FIG. 16 is a rear view.
The fifth embodiment is a modification of the fourth embodiment shown in FIGS. 11 to 13 described above, and differs from the fourth embodiment in the battery attachment portions 305A and 305B and the attachment portions 325A and 325B. ing. That is, in the fifth embodiment, the right battery attachment portion 305A and the left battery attachment portion 305B are arranged and configured so that the widths facing rearward are widened. For this reason, the batteries 345A and 345B attached to the battery attachment portions 305A and 305B are also attached in an arrangement state that spreads toward the rear. Other configurations and the like are substantially the same as in the case of the above-described fourth embodiment, and thus redundant description is omitted.

Although various embodiments of the present invention have been described above, various other embodiments of the present invention can be considered.
For example, the direction in which the battery 34 is attached or removed may be opposite to the direction described in the above embodiments.
Further, in each of the above-described embodiments, the configuration in which two 18V specification batteries 34 are attached and the 36V output jigsaw 10 is operated is exemplified. However, for example, a plurality of other output voltage batteries such as 14.4V specification are attached. Thus, it can be used as a power source for the electric motor with the total voltage as the rated voltage. In short, it is possible to effectively use a plurality of batteries owned by the user as spare batteries, etc. by installing a plurality of more widely used batteries and using them as a power source for an electric motor whose total voltage is the rated voltage. Therefore, the cutting tool 1 with higher output can be used, and thereby, the cutting tool with higher output can be popularized while suppressing the battery cost.

W ... Cutting material 10 ... Jigsaw 12 ... Base 14 ... Tool body 16 ... Electric motor 18 ... Driver 20 ... Blade 22 ... Reciprocation conversion mechanism 24 ... Handle part 26 ... Switch lever 28 ... Rods 30A, 30B ... Battery Attachment part 32 ... attachment part 34, 34A, 34B ... battery

Claims (5)

A base to be brought into contact with the cutting material, and a tool main body disposed on the upper surface side opposite to the position of the cutting material with respect to the base, the tool main body including an electric motor as a drive source And a reciprocating motion conversion mechanism that converts the rotational output of the electric motor of the driving unit into a reciprocating motion and transmits it to the blade, and a handle that is gripped by a user. A reciprocating cutting power tool for performing cutting processing,
2. A reciprocating cutting electric tool comprising two battery attachment portions for attaching a rechargeable battery as a power source to the tool main body portion in an exposed state that is detachable and visible from the outside. The reciprocating cutting power tool according to claim 1,
The two battery mounting portions are provided one by one at symmetrical positions with respect to the longitudinal or lateral axis of the tool passing through the center of gravity when the tool is viewed from the upper surface when the battery is mounted. A reciprocating cutting power tool characterized by comprising: The reciprocating cutting power tool according to claim 1 or 2,
The two batteries have a center of gravity located within a region extending in the front-rear direction from the region surrounded by the maximum outer width in the left-right direction and the up-down direction when the tool is viewed in a cross-section in the left-right direction. A reciprocating cutting power tool characterized in that a battery mounting portion is arranged and configured. A reciprocating cutting electric tool according to claim 2 or claim 3,
The mounting portions of the two batteries are arranged and configured so that the center of gravity positions of the two batteries themselves are positioned on the longitudinal axis of the tool passing through the center of gravity position of the tool when the battery is mounted. Reciprocating cutting power tool. The reciprocating cutting power tool according to claim 2 or 4,
The two battery mounting portions are disposed opposite to each other at a rear position in the tool main body portion, and the battery is inserted and attached to the battery mounting portion from above. Reciprocating cutting power tool characterized by.

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